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You think that steel
is
non-living and was never part of a
living thing.
You are correct!
Steel is manufactured from iron ore which is mined
from rocks in certain areas of the Earth's surface. Iron ore, which is mostly
iron oxide, is treated in a blast furnace to produce iron. The iron is then use
in steel manufacture. (Note: Small amounts of carbon are added to iron when
steel is made. It is very likely that this carbon once was part of a living
thing!)
Now try question
3
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© Shirley Burchill 2008 |
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Open Door Web Site